- The aim of blackjack is to beat the dealer by getting closer to 21 without going over.
- Basic strategy can bring the house edge down to around 0.5%, depending on the rules.
- Always choose tables where blackjack pays 3 to 2, not 6 to 5.
Check what blackjack pays before you sit down. A 6 to 5 table quietly costs you far more than any strategy mistake.
Blackjack rules
Blackjack is played against the dealer, not other players. You and the dealer each receive two cards, and you decide whether to take more cards to get closer to 21 without going bust.
- Number cards are worth their face value.
- Jacks, queens and kings are worth 10.
- Aces count as 1 or 11, whichever helps your hand.
- An ace plus a 10-value card as your first two cards is a blackjack, usually paid at 3 to 2.
Your options in blackjack
- Hit – take another card.
- Stand – keep your current total.
- Double down – double your stake and take exactly one more card.
- Split – split a pair into two separate hands, each with its own stake.
- Surrender – where offered, give up half your stake and end the hand.
- Insurance – a side bet when the dealer shows an ace. Basic strategy says avoid it.
Blackjack basic strategy
Basic strategy is the mathematically best decision for every combination of your hand and the dealer's face-up card. Following it can bring the house edge down to around 0.5%, depending on the table rules. Key rules include:
- Always split aces and 8s.
- Never split 10s or 5s.
- Always stand on hard 17 or more.
- Hit hard 12–16 when the dealer shows 7 or higher.
- Double on 11 against most dealer cards.
- Never take insurance.
Blackjack table rules to look for
| Rule | Better for players | Worse for players |
|---|---|---|
| Blackjack pays | 3 to 2 | 6 to 5 |
| Dealer on soft 17 | Stands | Hits |
| Double after split | Allowed | Not allowed |
| Surrender | Offered | Not offered |
| Number of decks | Fewer | More |
Types of online blackjack
- Classic and European blackjack – standard RNG versions, ideal for learning.
- Live blackjack – real dealers and real cards, streamed from studios.
- Infinite or unlimited blackjack – live games where any number of players share the same hand.
- Side bet games – such as Perfect Pairs and 21+3. Side bets add excitement but usually carry a higher house edge.
Can you count cards online?
Not effectively. RNG blackjack shuffles after every hand, and live blackjack usually uses multiple decks with regular shuffling.
Live blackjack
Live blackjack is played with real cards and a real dealer, streamed from a studio. Classic tables seat seven players, while "infinite" or "unlimited" versions let any number of players share the same hand and make their own decisions. Live tables usually have higher minimum stakes than RNG blackjack.
Common blackjack mistakes
- Taking insurance.
- Playing at tables where blackjack pays 6 to 5.
- Standing on soft 17 against a strong dealer card.
- Increasing stakes after losses.
- Relying on side bets, which usually carry a higher house edge.
Free blackjack games
RNG blackjack is often available in demo mode once you have verified your age. Free blackjack is the best way to practise basic strategy before you play for real money.
Playing a blackjack game online for real money
- Choose a UK-licensed casino from our best online casinos.
- Pick a table where blackjack pays 3 to 2.
- Set your stake within your budget.
- Use basic strategy for every decision.
Frequently asked questions
Is blackjack a game of skill?
Partly. Your decisions affect the outcome and basic strategy lowers the house edge, but the casino keeps an advantage over time.
What does blackjack pay?
A natural blackjack usually pays 3 to 2. Avoid tables that pay 6 to 5, which increases the house edge.
Should I take insurance in blackjack?
No. Basic strategy says insurance is a poor bet in the long run.
What is the best online blackjack game?
A single or low-deck table where blackjack pays 3 to 2, the dealer stands on soft 17 and doubling after splitting is allowed.
Can I play blackjack on mobile?
Yes. RNG and live blackjack are both available on mobile at all the casinos we review.
What is the difference between live and online blackjack?
Online (RNG) blackjack uses software to shuffle and deal; live blackjack uses a real dealer and cards streamed from a studio.
Can I play blackjack for free?
Yes. RNG blackjack is often available in demo mode at UK casinos once you have verified your age.